参数资料
型号: MC68HSC705J1ADW
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO20
封装: SOIC-20
文件页数: 5/162页
文件大小: 1714K
代理商: MC68HSC705J1ADW
Technical Data
MC68HC705J1A — Rev. 4.0
102
External Interrupt Module (IRQ)
MOTOROLA
External Interrupt Module (IRQ)
8.3 Operation
The interrupt request/programming voltage pin (IRQ/VPP) and port A
pins 0–3 (PA0–PA3) provide external interrupts. The PIRQ bit in the
mask option register (MOR) enables PA0–PA3 as IRQ interrupt sources,
which are combined into a single ORing function to be latched by the
IRQ latch. Figure 8-1 shows the structure of the IRQ module.
After completing its current instruction, the CPU tests the IRQ latch. If the
IRQ latch is set, the CPU then tests the I bit in the condition code register
and the IRQE bit in the IRQ status and control register. If the
I bit is clear and the IRQE bit is set, the CPU then begins the interrupt
sequence. This interrupt is serviced by the interrupt service routine
located at $07FA and $07FB.
The CPU clears the IRQ latch while it fetches the interrupt vector, so that
another external interrupt request can be latched during the interrupt
service routine. As soon as the I bit is cleared during the return from
interrupt, the CPU can recognize the new interrupt request. Figure 8-2
shows the sequence of events caused by an interrupt.
Figure 8-1. IRQ Module Block Diagram
PIRQ
LEVEL-SENSITIVE TRIGGER
PA3
PA2
PA1
IRQ
PA0
VDD
(MOR LEVEL BIT)
RESET
IRQ VECTOR FETCH
EXTERNAL
INTERRUPT
REQUEST
(MOR)
TO BIH & BIL
INSTRUCTION
PROCESSING
IRQF
IRQR
IRQE
DQ
CK
IRQ
CLR
LATCH
相关PDF资料
PDF描述
MC68A09ECS 8-BIT, 1.5 MHz, MICROPROCESSOR, CDIP40
MPC603CRC233E 32-BIT, 233 MHz, RISC PROCESSOR, CPGA288
MPC604CIM300E 32-BIT, 300 MHz, RISC PROCESSOR, CPGA288
MPC604EIP300C 32-BIT, 300 MHz, RISC PROCESSOR, CPGA288
MPC604FIP233E 32-BIT, 233 MHz, RISC PROCESSOR, CPGA288
相关代理商/技术参数
参数描述
MC68HSR705J1ACPE 功能描述:IC MCU 8BIT 64 BYTES RAM 20-PDIP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 标准包装:1 系列:87C 核心处理器:MCS 51 芯体尺寸:8-位 速度:16MHz 连通性:SIO 外围设备:- 输入/输出数:32 程序存储器容量:8KB(8K x 8) 程序存储器类型:OTP EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4 V ~ 6 V 数据转换器:- 振荡器型:外部 工作温度:0°C ~ 70°C 封装/外壳:44-DIP 包装:管件 其它名称:864285
MC68L11D0CFBE2 功能描述:8位微控制器 -MCU LO VOLT 8B MCU 192RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
MC68L11D0CFBE2R 功能描述:IC MCU 8BIT 192RAM 44-QFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 标准包装:1 系列:87C 核心处理器:MCS 51 芯体尺寸:8-位 速度:16MHz 连通性:SIO 外围设备:- 输入/输出数:32 程序存储器容量:8KB(8K x 8) 程序存储器类型:OTP EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4 V ~ 6 V 数据转换器:- 振荡器型:外部 工作温度:0°C ~ 70°C 封装/外壳:44-DIP 包装:管件 其它名称:864285
MC68L11D0FNE2 功能描述:8位微控制器 -MCU 8B MCU 192RAM LVDC RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
MC68L11E0FN2 制造商:Rochester Electronics LLC 功能描述:8-BIT MCU,512RAM,A/D,LVDC - Bulk